QW020A0G1 Lineage Power, QW020A0G1 Datasheet - Page 16

• Manufacturer Part Number: QW020A0G1
• Description: CONVERTER DC/DC 2.5V 50W OUT T/H
• Manufacturer: Lineage Power
• Series: QWr
• Type: Isolated with Remote On/Offr

Specifications of QW020A0G1

• Output: 2.5V
• Number Of Outputs: 1
• Power (watts): 50W
• Mounting Type: Through Hole
• Voltage - Input: 36 ~ 75V
• Package / Case: 8-DIP Module
• 1st Output: 2.5 VDC @ 20A
• Size / Dimension: 2.28" L x 1.45" W x 0.34" H (57.9mm x 36.8mm x 8.6mm)
• Power (watts) - Rated: 50W
• Operating Temperature: -40°C ~ 85°C
• Efficiency: 89%
• Approvals: CE, CSA, UL, VDE
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• 3rd Output: -
• 2nd Output: -
• 4th Output: -
• Lead Free Status / Rohs Status: No RoHS Version Available

Data Sheet
August 22, 2006
Thermal Considerations
The power modules operate in a variety of thermal environ-
ments; however, sufficient cooling should be provided to help
ensure reliable operation of the unit. Heat is removed by con-
duction, convection, and radiation to the surrounding environ-
ment. Proper cooling can be verified by measuring drain pin
of Q560 or of Q10 at the position indicated in Figure 44.
The temperature at Q560 and Q10 drain pins should not
exceed 110 °C. The output power of the module should not
exceed the rated power for the module
(VO, set x IO, max).
Although the maximum operating ambient temperature of the
power modules is 85 °C, you can limit this temperature to a
lower value for extremely high reliability.
Figure 44. Temperature Measurement
Heat Transfer via Convection
Increasing airflow over the module enhances the heat trans-
fer via convection. Figures 45—55 show the maximum cur-
rent that can be delivered by various modules versus local
ambient temperature (TA) for natural convection through 2 m/
s (400 ft./min.).
Systems in which these power modules may be used typi-
cally generate natural convection airflow rates of 0.3 ms
(60 ft./min.) due to other heat-dissipating components in the
system. Therefore, the natural convection condition repre-
sents airflow rates of up to 0.3 ms
Example
What is the minimum airflow necessary for a QW015A0F1
operating at VIN = 48 V, an output current of 12 A, and a
maximum ambient temperature of 75 °C.
Solution
Given:
Tyco Electronics Power Systems
Q10
VIN = 48V
IO = 12 A
TA = 75 °C
Location,QW015A0F (Top View).
–1
(60 ft./min.).
AIRFLOW
36 Vdc to 75 Vdc Input; 1.2 Vdc to 5.0 Vdc Output; 10 A to 20 A
Q560
QW010/015/020 Series Power Modules: dc-dc Converters;
–1
Determine airflow (v) (Use Figure 52)
Figure 45. Derating Curves for QW010A0A1 (VO = 5.0V)
Figure 46. Derating Curves for QW010A0F1 (VO = 3.3V)
Figure 47. Derating Curves for QW010A0G1 (VO = 2.5V)
16
14
12
10
8
6
4
2
0
10
20
20
15
10
8
6
4
2
0
5
0
25
25
v = 0.5 m/s (100 ft./min.)
30
30
in Longitudinal Orientation with no heat sink
(VI = 48 Vdc).
in Longitudinal Orientation with no heat sink
(VI = 48 Vdc).
in Longitudinal Orientation with no heat sink
(VI = 48 Vdc).
LOCAL AMBIENT TEMPERATURE, T
NATURAL CONVECTION
35
35
LOCAL AMBIENT TEMPERATURE, T
2.0 m/s (400 ft./min.)
1.0 m/s (200 ft./min.)
0.5 m/s (100 ft./min.)
40
40
NATURAL CONVECTION
NATURAL CONVECTION
Local Ambient Temperature T
45
45
2.0 m/s (400 ft./min.)
1.0 m/s (200 ft./min.)
0.5 m/s (100 ft./min.)
2.0 m/s (400 ft./min.)
1.0 m/s (200 ft./min.)
0.5 m/s (100 ft./min.)
50
50
55
55
60
60
65
65
A
70
(˚C)
A
70
(˚C)
A
75
75
(˚C)
80
80
85
85
90
16